Nova Patents
AU2005295796B2

Nematode resistant transgenic plants

Abstract

Compositions and methods for providing nematode resistance are provided. One aspect provides transgenic plants or cells comprising an inhibitory nucleic acid specific for one or more nematode esophageal polypeptides. Other aspects provide transgenic plants or cells resistant to at least two different root-knot nematode species.

Term

Term ended

Expired 13 October 2025, 0.9 years ago.

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7 claims: 6 independent, 1 dependent

  1. 1
    CLAIMS:1. A transgenic plant or transgenic plant cell comprising a double-stranded RNA inhibitory nucleic acid at least 21 nucleotides long and complementary to part or all of 5 a mRNA encoding a protein encoded by SEQ ID NOS 1 or 2, wherein the transgenic plant or transgenic plant cell is resistant to nematode diseases caused by at least two different nematode species, and wherein the double-stranded RNA inhibitory nucleic acid inhibits translation of mRNA encoding a protein encoded by SEQ ID NOS 1 or 2. 10 2. The transgenic plant or transgenic plant cell of claim 1, wherein the inhibitory nucleic acid comprises microRNA. 3. The transgenic plant or transgenic plant cell of claim 1 or 2, wherein the inhibitory nucleic acid comprises non-natural or natural nucleotides. 4. The transgenic plant or transgenic plant cell of any one of the preceding claims, wherein the inhibitory nucleic acid comprises at least one modified intemucleotide linkage. 20 5. The transgenic plant or transgenic plant cell of any one of the preceding claims, wherein the transgenic plant or transgenic plant cell is resistant to nematode disease caused by а. M. incognita. 25 b. M. incognita, and M.javanica. c. M. incognita, M. javanica, and M. arenaria. d, M. incognita, M. javanica, M. arenaria, and M. hapla or M. chitwoodi. б. The transgenic plant or transgenic plant cell of any one of the preceding claims, 30 wherein the inhibitory nucleic acid is an amount effective to a) reduce, inhibit, or prevent expression of the nematode esophageal gland cell secretory polypeptide by a parasitic nematode feeding on the transgenic plant or cell compared to a control plant or cell;or 35 b) reduce, inhibit, or prevent nematode disease compared to a control plant or cell;or 2005295796 21 Jun2010 c) reduce, inhibit, or prevent expression of the nematode esophageal polypeptide by at least two root-knot nematode species parasitic nematode feeing on the transgenic plant or cell compared to a control plant or cell;or d) reduce, inhibit, or prevent nematode diseases caused by at least two different 5 root-knot nematode species compared to a control plant or cell. 7. The transgenic plant or transgenic plant cell of any one of the preceding claims, wherein the nematode is a member of Meloidogyne ssp. 10 8. The transgenic plant or transgenic plant cell of any one of the preceding claims, wherein the transgenic plant or transgenic plant cell is a monocot or dicot. 9. The transgenic plant or transgenic plant cell of claim 8, wherein the transgenic plant or transgenic plant cell is a member of the phylogenic family selected from the 15 group consisting of Rosaceae, Fabaceae, Passifloraceae, Cucurbitaceae, Malvaceae, Euphorbiaceae, Vitaceae, Solanaceae, Convolvulaceae, Rubiaceae, Leguminosae, and Brassicaceae. 10. The transgenic plant or transgenic plant cell of claim 9, wherein the transgenic 20 plant is a tomato, eggplant, potato, melon, cucumber, carrot, lettuce, artichoke, celery, curcubits, barley, com, peanut, soybean, sugar beet, cotton, cowpea, beans, alfalfa, tobacco, citrus, clover, pepper, grape, coffee, olive, or tea. 11. The transgenic plant or transgenic plant cell of any one of the preceding claims, 25 wherein the inhibitory nucleic acid a) inhibits or interferes with the translation of mRNA encoding the nematode esophageal gland cell polypeptide;or b) induces or promotes the degradation or mRNA encoding the nematode esophageal gland cell polypeptide. 12. The transgenic plant or transgenic plant cell of any one of the preceding claims, wherein the transgenic plant or transgenic plant cell comprises two or more inhibitory nucleic acids specific for different nematode esophageal gland cell polypeptide. 100 WO 2006/044480 PCT/US2005/036711 1/7 Figure 1A Figure 1B WO 2006/044480 PCT/US2005/036711
  2. 2
    2/7 35S::16D10 Vector Figure 2 WO 2006/044480 PCT/US2005/036711
  3. 3
    3/7 Figure 3 Primary root Lateral roots Adventitious roots Number of LRand AR WO 2006/044480 PCT/US2005/036711
  4. 4
    4/7 Figure 4 16D1O (271 bp) 16D10 (42 bp) 1.0 0.5 0.25 Mi-act WO 2006/044480 PCT/US2005/036711
  5. 5
    5/7 1.5 1.0 0.75 0.5 0.25 Figure 5 SH1 ί (888 bp) 31H06 (240 bp) 0.25 Mi-act WO 2006/044480 PCT/US2005/036711
  6. 6
    6/7 Figure 6 Mi Mj Ma Mh Ml El b| El b|ei b| El B 0.6 WO 2006/044480 PCT/US2005/036711
  7. 7
    7/7 Figure 7 □ CK 16D10i-1 □ 16D10i-2